John Zak, M.D.
Gastroenterology Physician · Ormond Beach, FL
John Zak, M.D. is a gastroenterology physician with a practice address in Ormond Beach, Florida, and NPI 1548210594, issued on May 11, 2006. Check the license (Florida ME51680, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- John Zak
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- ME51680 FL
0051680 FL
Self-reported in NPPES; status is on the state search - Practice location
- 570 Memorial Cir Ste 110, Ormond Beach, FL 32174
- Phone
- (386) 437-5980
- Enumerated
- May 11, 2006
- Record last updated
- Sep 1, 2023
- Fax
- (386) 437-5981
- Medicaid ID
- 372114100 FL
- Medicare enrollment
- Enrolled (PECOS I20060718000252); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,513 in Florida → Look up another NPI →
Also registered at 570 Memorial Cir Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shannon Riley, VICE PRESIDENT OF OPLaboratory Management Specialist/Technologist1013664796
Verify John Zak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME51680Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% more Medicare Part D claims than the average gastroenterology physician in 2024
1,025 Medicare Part D claims for 295 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Famotidine438 claims
- Pantoprazole Sodium148 claims
- Sod Sulf-Potass Sulf-Mag Sulf104 claims
- Sucralfate99 claims
- Cholestyramine38 claims
- Omeprazole24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $15.35
1 payment: food and beverage; the largest payer was Olympus America Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John Zak among 1,513 gastroenterology physician records in Florida
John Zak, M.D. is one of 1,513 gastroenterology physician records with a practice address in Florida. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 17% of them.
- NPI issued2006 · 17% of these records are older, 45% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1984 · median 2000 among the 1,156 with a school on file
- Record last updated2023 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Florida
There are 1,513 gastroenterology physician records in Florida.
All 1,513 in Florida → Every provider in Ormond Beach → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Arun Dhand, M.D.Ormond Beach, FL 321741962490011
- Harold Sullivan, MD, MPHPalatka, FL 321771013987635
- Antonio Decarli, M.D.New Smyrna Beach, FL 321681376644328
- William Rengifo Cam, MDNew Smyrna Beach, FL 321681154551653
- Ahmad Alawad, MDPalm Coast, FL 321641598996415
- Wallace Combs, MDPalm Coast, FL 321641437257532
- Issam Nasr, MDPalm Coast, FL 321641659325165
- Safwan Shams, M.D.Palm Coast, FL 321641316970205
Common questions
What is John Zak, M.D.'s NPI number?
John Zak, M.D.'s National Provider Identifier (NPI) is 1548210594, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Zak, M.D. located?
The NPPES record lists a practice address at 570 Memorial Cir Ste 110, Ormond Beach, FL, 32174. Phone: (386) 437-5980. Providers update this record themselves, so call before visiting.
How can I verify John Zak, M.D.'s license?
NPPES lists Florida license number ME51680, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Zak, M.D. prescribe under Medicare Part D?
In 2024, John Zak, M.D. had 1,025 Medicare Part D claims for 295 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is John Zak, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.